export const format = (datetime) => {
  var date = new Date(datetime); //时间戳为10位需*1000，时间戳为13位的话不需乘1000
  var year = date.getFullYear(),
    month = ("0" + (date.getMonth() + 1)).slice(-2),
    sdate = ("0" + date.getDate()).slice(-2),
    hour = ("0" + date.getHours()).slice(-2),
    minute = ("0" + date.getMinutes()).slice(-2),
    second = ("0" + date.getSeconds()).slice(-2);
  // 拼接
  var result =
    year + "-" + month + "-" + sdate + " " + hour + ":" + minute + ":" + second;
  // 返回
  return result;
};
